56457539 has 2 divisors, whose sum is σ = 56457540. Its totient is φ = 56457538.

The previous prime is 56457517. The next prime is 56457551. The reversal of 56457539 is 93575465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56457539 - 2¹² = 56453443 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56457539.

It is not a weakly prime, because it can be changed into another prime (56457509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28228769 + 28228770.

It is an arithmetic number, because the mean of its divisors is an integer number (28228770).

Almost surely, 2^56457539 is an apocalyptic number.

56457539 is a deficient number, since it is larger than the sum of its proper divisors (1).

56457539 is an equidigital number, since it uses as much as digits as its factorization.

56457539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 44.

The square root of 56457539 is about 7513.8231946194. The cubic root of 56457539 is about 383.6253647814.

The spelling of 56457539 in words is "fifty-six million, four hundred fifty-seven thousand, five hundred thirty-nine".